PURPOSE: To enable the sure discharging of small fiber rubbishes while a needle having an openable eye penetrates and moves each layer of composite core elements in tridimensional weaving, by constructing the needle in such a manner that an axial aperture of the needle has a bottom opening and communicates to the exterior through an oblique tubular part having a specific angle against the axis of the needle.

CONSTITUTION: A needle having an openable eye for using in a lacing stage of a tridimensional weaving of composite core elements is constructed in such a manner that an axial aperture 13 having an opening at the bottom communicates to the exterior through an orifice 15 adjacent to an eye 12 and further through an oblique tubular part 14 having an angle of 30°-90°, preferably 45°, against the axial line of the body of the needle.